A rear hood assembly system is proposed for vehicles. The rear hood assembly includes a multi-joint link assembly. The multi-joint link assembly couples the rear hood to a vehicle body. The multi-joint link assembly includes a locking link. The locking link can move between a locked position and an unlocked position. When the locking link is in the locked position, a rotary joint pivotably couples the locking link to the vehicle body to raise the rear edge of the rear hood. When the locking link is in the unlocked position, the rotary joint is unlocked.